.main_content {
  width: 100%;
  height: 100%;
  background: #f5f3ff;
  border-radius: 20rpx;
}

.content {
  width: 100%;
  height: calc(100% - 80rpx);
  padding: 40rpx;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.box {
  width: 100%;
}

.title {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;

  .title_line {
    width: 645rpx;
    height: 5rpx;
    background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/line.png) center center/cover no-repeat;
  }

  .title_text {
    font-size: 48rpx;
    color: #0787d1;
  }
}

.lesson {
  width: 100%;
  margin-top: 60rpx;
  display: flex;
  justify-content: center;
  align-items: center;

  .leeson_container {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;

    &.active {}

    &:nth-child(2n+1) {
      width: 282rpx;
      height: 300rpx;
      background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/bg1.png) center center/cover no-repeat;
    }

    &:nth-child(2n) {
      width: 282rpx;
      height: 300rpx;
      background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/bg2.png) center center/cover no-repeat;
    }

    &:nth-child(1) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon1.png) center center/cover no-repeat;
      }
    }

    &:nth-child(2) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon2.png) center center/cover no-repeat;
      }
    }

    &:nth-child(3) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon3.png) center center/cover no-repeat;
      }
    }

    &:nth-child(4) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon4.png) center center/cover no-repeat;
      }
    }

    &:nth-child(5) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon5.png) center center/cover no-repeat;
      }
    }

    &:nth-child(6) {
      .leeson_icon {
        background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/type_icon6.png) center center/cover no-repeat;
      }
    }

    .leeson_icon {
      width: 187rpx;
      height: 154rpx;
    }

    .leeson_content {
      width: auto;
      margin-top: 20rpx;
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
      align-items: center;

      .leeson_title {
        margin-bottom: 10rpx;
        font-size: 36rpx;
        color: #fff;
      }

      .leeson_text {
        font-size: 24rpx;
        color: #fff;
      }
    }
  }
}

.difficulty {
  width: 100%;
  margin-top: 60rpx;
  padding: 0 40rpx;
  display: flex;
  justify-content: center;
  align-items: center;

  .difficulty_content {
    width: 180rpx;
    height: 64rpx;
    margin: 0 18rpx;
    border-radius: 10rpx;
    background: #0b88ca;
    font-size: 30rpx;
    color: #dddddd;
    line-height: 64rpx;
    text-align: center;

    &.active {
      box-shadow: 0px 6rpx 0px 0px #7e50b3;
      color: #ffffff;
    }
  }
}

.button {
  width: 223rpx;
  height: 103rpx;
  padding-bottom: 10rpx;
  background: url(https://hengxiao-resource.oss-cn-hangzhou.aliyuncs.com/web/resources/images/hengxiao/read/btn_bg.png) center center/cover no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;

  text {
    font-size: 32rpx;
    color: #fff;
  }
}

.tabs {
  width: auto;
  display: flex;
  position: absolute;
  top: -40rpx;
  right: 40rpx;
}

.tabs_item {
  width: auto;
  display: flex;
  flex-direction: column;
  align-items: center;

  &+.tabs_item {
    margin-left: 50rpx;
  }
}

.tabs_img {
  width: 44rpx;

  image {
    width: 100%;
  }
}

.tabs_text {
  margin-top: 12rpx;
  font-size: 24rpx;
  color: #4dbdb7;
}

.mask_container {
  width: 1500rpx;
  height: auto;
  padding: 16rpx;
  background: #81d5fa;
  border-radius: 80rpx;
  box-shadow: 10rpx 10rpx 0px 0px #0091ea;
  position: relative;
}

.mask_content {
  width: 100%;
  height: 100%;
  padding: 24rpx;
  background: #ffffff;
  border-radius: 80rpx;
}

.mask_con {
  width: 100%;
  height: 100%;
  border: 4rpx solid #f6f6f6;
  border-radius: 80rpx;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;

  .mask_title {
    width: 500rpx;
    height: 64rpx;
    background: #f6f6f6;
    border-radius: 0px 0px 30rpx 30rpx;
    font-size: 42rpx;
    font-weight: bold;
    color: #0091ea;
    line-height: 64rpx;
    text-align: center;
  }

  .mask_word {
    width: 100%;
    height: 760rpx;
    padding: 20rpx 40rpx;
    overflow-y: auto;
  }

  .mask_option {
    width: 100%;
    margin-top: 70rpx;
    margin-bottom: 44rpx;
    padding: 0 80rpx;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .mask_option_content {
      width: 270rpx;
      height: 70rpx;
      padding-left: 44rpx;
      padding-right: 22rpx;
      border-radius: 35rpx;
      background: #81d5fa;
      display: flex;
      justify-content: space-between;
      align-items: center;

      text {
        font-size: 36rpx;
        color: #ffffff;
      }

      image {
        width: 40rpx;
        height: 40rpx;
      }
    }
  }

  .mask_list {
    width: 100%;
    padding: 0 80rpx;

    .mask_item {
      width: 100%;
      height: 80rpx;
      display: flex;
      justify-content: flex-start;
      align-items: flex-start;

      &:first-child {
        .mask_item_content {
          color: #333333;
          font-weight: 700;
        }
      }

      &:nth-child(2n + 1) {
        background: #f6f6f6;
      }

      .mask_item_content {
        flex: 1;
        font-size: 36rpx;
        color: #666666;
        line-height: 80rpx;
        text-align: center;
      }
    }
  }

  .mask_tips {
    text {
      font-size: 32rpx;
      font-weight: bold;
      color: #999999;

      &.active {
        color: #ffd541;
      }
    }
  }

  .mask_paragraph {
    width: 100%;
    flex: 1;
    padding: 90rpx 120rpx 100rpx;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;

    .mask_paragraph_title {
      text {
        font-size: 42rpx;
        font-style: italic;
        color: #333333;

        &.active {
          color: #0091ea;
          font-style: normal;
          padding-right: 40rpx;
        }
      }
    }

    .mask_paragraph_text {
      font-size: 36rpx;
      color: #333333;
      line-height: 56rpx;
    }
  }
}

.mask_close {
  position: absolute;
  top: 0;
  right: -104rpx;

  image {
    width: 80rpx;
    height: 80rpx;
  }
}

.mask_chart {
  width: 100%;
  padding: 0 20rpx;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}

.mask_chart_container {
  width: 400rpx;
  margin-top: 50rpx;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;

  .mask_chart_name {
    font-size: 28rpx;
    color: #333;
  }

  .mask_chart_content {
    width: 320rpx;
    height: 320rpx;
  }
}